The molten rocks found inside the Earth are known as magma. It is in liquid form rich in silica that solidifies as it reaches near the crust of the Earth.

The water present on the Earth collectively comes under the term hydrosphere. More than 97% of this water is saltwater.

Grains of minerals bond together to form rocks. Rocks are classified into three types: igneous, metamorphic, and sedimentary.

Basalt is a type of igneous rock. It is used to make roads surfaces as it is resistant to weathering due to extreme temperatures and has high elastic strength.

It is in the sedimentary rocks that fossils are found. The deposition of minerals on the surface of the Earth over a period leads to the formation of sedimentary rocks.

Volcanic activity leads to the formation of igneous rocks. Since they are formed by the solidification of magma, they are also known as magma rocks.

The hardest element found on Earth is diamond which is a form of pure carbon in sold form. They also have the highest thermal conductivity among natural metals.

James Hutton, who was a Scottish naturalist and a farmer, is regarded as the father of geology. He is credited with producing many theories on rock formations.

The hardest or the most rigid part of the earth is the Lithosphere. It is further divided into the oceanic and continental lithosphere.

The crust is the least dense layer of the Earth. The crust, along with the upper part of the mantle, together makes the lithosphere.